Le samedi 27 mars 2010 19:23:04, Daniel Roseman a écrit :
> On Mar 27, 4:34 pm, Thierry Chich <thierry.ch...@gmail.com> wrote:
> > I think I get the point.
> >
> > If I write
> > obj=MyModel()
> > obj.domaine=request.session.get("domaine")
> > form=MyModelForm(instance=obj)
> > if form.is_valid():
> > form.save()
> >
> > It works (but I didn't populate my form)
> > So it seems that the data provided in data=request.POST are overwriting
> > my domaine field.
> > It is really curious, because request.POST doesn't contain any reference
> > to my field domaine
> >
> > It's look like a bug, isn't it ?
>
> No, this is expected and documented behaviour. If the POST doesn't
> contain a value for a particular model field, that field is set to
> blank. This is because an empty HTML field is not included in an POST,
> exactly as if the field wasn't on the form at all.
>
This make sense. It is obvously a good reason.
> If you don't want this to happen, exclude the domaine field from the
> form altogether via the modelform Meta 'fields' or 'exclude' tuples.
OK. I can also put an hidden field in my form. I will evaluate what is the
better option for me.
Thanks very much.
Thierry
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